JPS628677B2 - - Google Patents
Info
- Publication number
- JPS628677B2 JPS628677B2 JP4909882A JP4909882A JPS628677B2 JP S628677 B2 JPS628677 B2 JP S628677B2 JP 4909882 A JP4909882 A JP 4909882A JP 4909882 A JP4909882 A JP 4909882A JP S628677 B2 JPS628677 B2 JP S628677B2
- Authority
- JP
- Japan
- Prior art keywords
- bobbin
- air gap
- servo valve
- yoke
- liquid metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 12
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012762 magnetic filler Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/066—Electromagnets with movable winding
Description
【発明の詳細な説明】
本発明は、サーボ弁に係り、フオースモータに
よつて直接スプールを駆動する形式のサーボ弁に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a servo valve, and more particularly to a servo valve in which a spool is directly driven by a force motor.
従来、フオースモータによつて直接スプールを
駆動する形式のサーボ弁は、その可動部を軽量化
できることにより、高応答を得ることができると
いう特長があり、圧延機、振動台の油圧駆動系に
採用されている。 Conventionally, servo valves that directly drive the spool with force motors have the advantage of being able to achieve high response by reducing the weight of their moving parts, and have been adopted in hydraulic drive systems for rolling mills and vibration tables. ing.
一方、この種のサーボ弁を用いる機器には、さ
らに高応答、高出力化が要求されている。この要
求を満すためには、フオースモータのボビンにお
ける巻線に、大きな電流を加えることになる。こ
の結果、巻線が発熱し、焼損することがあつた。 On the other hand, devices using this type of servo valve are required to have even higher response and higher output. To meet this requirement, a large current is applied to the windings on the force motor bobbin. As a result, the windings generated heat and were burnt out.
この巻線の発熱、およびこれに伴なう焼損を防
止するために、従来は、フオースモータを構成す
るヨークと巻線との間のエアギヤツプを冷却する
ことが種々提案されている。その代表的な例とし
ては、エアギヤツプ部を油冷することが行なわれ
ている。しかし、これらの冷却手段は冷却媒体の
熱伝導率が小さいため、冷却性能に限界があり、
サーボ弁の出力増加におのずから限界を生じてい
る。 In order to prevent the windings from generating heat and the burnout that accompanies this, various proposals have been made to cool the air gap between the yoke and the windings that constitute the force motor. A typical example is cooling the air gap with oil. However, these cooling methods have limited cooling performance due to the low thermal conductivity of the cooling medium.
There is a natural limit to increasing the output of the servo valve.
本発明は上述の事柄にもとづいてなされたもの
で、発熱部の熱除去を有効に行ない、出力増加を
図ることができるサーボ弁を提供することを目的
とする。 The present invention has been made based on the above-mentioned problems, and an object of the present invention is to provide a servo valve that can effectively remove heat from a heat generating part and increase output.
本発明は上記の目的を達成するために、フオー
スモータで直接スプールを駆動するサーボ弁にお
いて、前記フオースモータを構成するボビンの巻
線部が挿入されるエアギヤツプ内に、液体金属を
充填し、この液体金属を充填したエアギヤツプの
ボビンがわ部に、ボビンに密接する弾性体を装設
したものである。 In order to achieve the above object, the present invention provides a servo valve in which a spool is directly driven by a force motor, in which an air gap into which a winding part of a bobbin constituting the force motor is inserted is filled with liquid metal, and the liquid metal An elastic body that is in close contact with the bobbin is attached to the side of the bobbin of the air gap filled with the bobbin.
以下本発明の実施例を図面を参照して説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明のサーボ弁の一実施例を示すも
ので、図において１は弁枠、２は弁枠１内で摺動
するスプール弁体で、通路を切替えてアクチユエ
ータ（図示せず）に圧油を供給する。３はスプー
ル弁体２を駆動するフオースモータである。この
フオースモータ３は磁気回路構成部を備えてい
る。この磁気回路構成部はマグネツト４と第１の
ヨーク５と第２のヨーク６とを備えている。この
第１のヨーク５と第２のヨーク６は前記したマグ
ネツト４を狭持固定していると共に、エアギヤツ
プ７を形成している。このエアギヤツプ７にはボ
ビン８の巻線部９が挿入されている。この巻線部
９の給電線９Ａは外部に導出されている。ボビン
８はスプール弁体２に連結している。エアギヤツ
プ７には例えば水銀またはガリウム・インジウム
等の常温で液状を呈する液体金属１０が満たされ
ている。この液体金属１０のエアギヤツプ７から
の流出を防ぐために、エアギヤツプ７のマグネツ
ト４側、すなわち第１のヨーク５、第２のヨーク
６およびマグネツト４で形成される空間には非磁
性体の充填材１１が充填され、またエアギヤツプ
７のスプール側にはボビン８の内側および外側に
密接するゴム等の弾性体１２，１３が設けられて
いる。これらの弾性体１２，１３は支持体１４，
１５に結合されている。これらの支持体１４，１
５はボルト１６，１７によつてそれぞれ第２のヨ
ーク６および第１のヨーク５に固定されている。
前述したエアギヤツプ７のスプール弁体側におけ
る内側面および外側面をテーパ面１８，１９に形
成することにより、弾性体１２，１３をボビン８
の移動に追従させることができると共に液体金属
１０のシールを確実にすることができる。テーパ
面１８，１９がなくても、弾性体１２，１３が動
き得る場合にはこのテーパ面は１８，１９は必要
なものではない。２０はスプール弁体２の支持ば
ね、２１はスプール弁体２の中立位置調整装置で
ある。 FIG. 1 shows an embodiment of the servo valve of the present invention. In the figure, 1 is a valve frame, 2 is a spool valve body that slides within the valve frame 1, and the actuator (not shown) switches the passage. Supply pressure oil to. 3 is a force motor that drives the spool valve body 2. This force motor 3 includes a magnetic circuit component. This magnetic circuit component includes a magnet 4, a first yoke 5, and a second yoke 6. The first yoke 5 and the second yoke 6 sandwich and fix the magnet 4, and also form an air gap 7. A winding portion 9 of a bobbin 8 is inserted into the air gap 7. A power supply line 9A of this winding portion 9 is led out to the outside. The bobbin 8 is connected to the spool valve body 2. The air gap 7 is filled with a liquid metal 10, such as mercury or gallium/indium, which is in a liquid state at room temperature. In order to prevent this liquid metal 10 from flowing out of the air gap 7, a non-magnetic filler 11 is placed on the magnet 4 side of the air gap 7, that is, in the space formed by the first yoke 5, the second yoke 6, and the magnet 4. The spool side of the air gap 7 is provided with elastic bodies 12 and 13 made of rubber or the like that are in close contact with the inside and outside of the bobbin 8. These elastic bodies 12 and 13 are supported by a support body 14,
15. These supports 14,1
5 is fixed to the second yoke 6 and the first yoke 5 by bolts 16 and 17, respectively.
By forming the inner and outer surfaces of the air gap 7 on the spool valve body side into tapered surfaces 18 and 19, the elastic bodies 12 and 13 are attached to the bobbin 8.
can be made to follow the movement of the liquid metal 10, and the sealing of the liquid metal 10 can be ensured. If the elastic bodies 12, 13 can move even without the tapered surfaces 18, 19, the tapered surfaces 18, 19 are not necessary. 20 is a support spring for the spool valve body 2, and 21 is a neutral position adjusting device for the spool valve body 2.
以上述べたように構成したことにより、弾性体
１２，１３および充填材１１はエアギヤツプ７内
に充填した液体金属１０を漏出させることなく、
エアギヤツプ７内に維持させることができる。こ
のため、巻線部９で発生したジユール熱は、液体
金属１０を通して効率良く第１のヨーク５および
第２のヨーク６に伝えられ、外部に放散される。
また液体金属１０は油等に比べてその熱伝達率が
40〜100倍であるので、各ヨーク５，６への熱伝
達が良好となる。この結果、巻線部９の冷却が良
好となり、大電流の印加が可能となるものであ
る。 With the configuration described above, the elastic bodies 12 and 13 and the filler 11 can prevent the liquid metal 10 filled in the air gap 7 from leaking.
It can be maintained within the air gap 7. Therefore, the Joule heat generated in the winding portion 9 is efficiently transmitted to the first yoke 5 and the second yoke 6 through the liquid metal 10, and radiated to the outside.
Also, liquid metal 10 has a higher heat transfer coefficient than oil etc.
Since it is 40 to 100 times as large, heat transfer to each yoke 5 and 6 is improved. As a result, the winding portion 9 can be cooled well, and a large current can be applied.
第２図は本発明のサーボ弁の他の実施例を示す
もので、この実施例は弾性体１２，１３のボビン
８への密接部をナイフ状に形成し、このナイフ状
部をボビン８に押付けるようにして、液体金属１
０のシール性を高めたものである。このように構
成しても、第１図に示す実施例と同様に巻線部９
の冷却を十分に行なうことができる。 FIG. 2 shows another embodiment of the servo valve of the present invention. In this embodiment, the portions of the elastic bodies 12 and 13 that are in close contact with the bobbin 8 are formed in a knife shape, and this knife-shaped portion is attached to the bobbin 8. Liquid metal 1 by pressing
0 with improved sealing performance. Even with this configuration, the winding portion 9 is similar to the embodiment shown in FIG.
can be sufficiently cooled.
以上述べたように、本発明によれば、エアギヤ
ツプへの液体金属の保持が確実となり、それによ
る冷却効率も向上するので、さらに大きな電流の
印加が可能となり、サーボ弁の出力を大幅に増加
させることができるものである。 As described above, according to the present invention, the liquid metal is reliably retained in the air gap and the cooling efficiency is thereby improved, making it possible to apply even larger current and significantly increasing the output of the servo valve. It is something that can be done.
第１図は本発明のサーボ弁の一実施例を示す縦
断面図、第２図は本発明のサーボ弁の他の実施例
の要部を示す縦断面図である。
１……弁枠、２……スプール弁体、３……フオ
ースモータ、４……マグネツト、５……第１のヨ
ーク、６……第２のヨーク、７……エアギヤツ
プ、８……ボビン、９……ボビン８の巻線、１０
……液体金属、１１……充填材、１２，１３……
弾性体。
FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the servo valve of the present invention, and FIG. 2 is a longitudinal cross-sectional view showing essential parts of another embodiment of the servo valve of the present invention. DESCRIPTION OF SYMBOLS 1... Valve frame, 2... Spool valve body, 3... Force motor, 4... Magnet, 5... First yoke, 6... Second yoke, 7... Air gap, 8... Bobbin, 9 ...Winding of bobbin 8, 10
...liquid metal, 11...filler, 12,13...
Elastic body.
Claims (1)
ーボ弁において、前記フオースモータを構成する
ボビンの巻線部が挿入されるエアギヤツプ内に、
液体金属を充填し、この液体金属を充填したエア
ギヤツプのボビンがわ部に、ボビンに密接する弾
性体を装設したことを特徴とするサーボ弁。 ２ 弾性体のボビンに密接する部分はナイフ状に
形成され、ボビンに押付けられることを特徴とす
る特許請求の範囲第１項記載のサーボ弁。 ３ エアギヤツプにおけるボビン側の内、外周面
はテーパ面に形成されていることを特徴とする特
許請求の範囲第１項または第２項記載のサーボ
弁。[Scope of Claims] 1. In a servo valve in which a spool is directly driven by a force motor, an air gap in which a winding portion of a bobbin constituting the force motor is inserted,
A servo valve characterized in that an air gap filled with liquid metal is provided with an elastic body that comes into close contact with the bobbin on the side of the bobbin. 2. The servo valve according to claim 1, wherein a portion of the elastic body that comes into close contact with the bobbin is formed into a knife shape and is pressed against the bobbin. 3. The servo valve according to claim 1 or 2, wherein the inner and outer circumferential surfaces of the air gap on the bobbin side are formed into tapered surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4909882A JPS58166183A (en) | 1982-03-29 | 1982-03-29 | Servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4909882A JPS58166183A (en) | 1982-03-29 | 1982-03-29 | Servo valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58166183A JPS58166183A (en) | 1983-10-01 |
| JPS628677B2 true JPS628677B2 (en) | 1987-02-24 |
Family
ID=12821614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4909882A Granted JPS58166183A (en) | 1982-03-29 | 1982-03-29 | Servo valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58166183A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4063904A1 (en) | 2021-03-22 | 2022-09-28 | Ricoh Company, Ltd. | Distance measurement apparatus and distance measurement method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6440772A (en) * | 1987-08-06 | 1989-02-13 | Matsushita Electric Ind Co Ltd | Fluid control valve |
| US5094218A (en) * | 1991-03-22 | 1992-03-10 | Siemens Automotive Limited | Engine exhaust gas recirculation (EGR) |
| US5960831A (en) * | 1993-05-07 | 1999-10-05 | Robohand, Inc. | Electromechanical servovalve |
| US5771884A (en) * | 1997-03-14 | 1998-06-30 | Nellcor Puritan Bennett Incorporated | Magnetic exhalation valve with compensation for temperature and patient airway pressure induced changes to the magnetic field |
-
1982
- 1982-03-29 JP JP4909882A patent/JPS58166183A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4063904A1 (en) | 2021-03-22 | 2022-09-28 | Ricoh Company, Ltd. | Distance measurement apparatus and distance measurement method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58166183A (en) | 1983-10-01 |
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